Machine for upsetting metal



(No Model.)

W. P. BETTENDORF. MACHINE FOR UPSETTING METAL.

No. 432,360. Patented July 15, 1890.

w i? W UNITED STATES PATENT OFFICE.

WILLIAM P. BETTENDORF, OF DAVENPORT, IOlVA.

MACHINE FOR UPSETTING METAL.

SPECIFICATION forming part of Letters Patent No. 432,360, dated July 15, 1890.

Application filed May 20, 1890. Serial No. 352,684. (No model.)

To all whom it may concern.-

Be it known that I, ILLIAM' P. BETTEN- DORE, of Davenport, in the county of Scott and State of Iowa, have invented certain Improvements in Machines for Upsetting Metal, of which the following is a specification.

This invention relates to a machine for upsetting metal rods and tubes in such manner as to form simultaneously two collars or flanges thereon near each other.

The essence of the invention is in the combination of means for applying pressure endwise to the rod and dies adapted to give form to and determine the distance between the collars. The supporting-frame, the mechanism for imparting motion to the operative parts, and other details may be modified at will within the range of mechanical skill.

In the accompanying drawings, Figure 1 is a side elevation of the upsetting devices with a rod in position to be acted on thereby. Fig. 2 is a similar view with the parts as they appear at the completion of their operation. Fig. 3 is a longitudinal vertical section on the line 3 3, Figs. 1 and 2, showing, also, the frame and operating mechanism. Fig. 4 is a view showing the mandrel to give internal support to tubing when acted upon by the machine.

A represents a rigid framing, which may be of anyform and construction adapted to give support to the moving parts.

B B are two co-operating clamps grooved in their opposing ends to admit of their encircling and firmly holding the rod to be operated on. Both clamps maybe movable; but in the drawings I have shown clamp B as fixed, while clamp B is mounted to slide in the frame and moved to and fro by a roller I), mounted thereon and extending into an angular oblique groove 0 in an arm 0, fixed to a reciprocating cross-head O. The cross-head is guided in any suitable manner and operated, as shown in Fig. 3, by pitman D, extending to a crank-wheel O. The cross-head carries a hollow die or bunter F, which being carried forward fits over the end of the rod under treatment to keep the same in shape, and by its continued movement compresses or upsets the rod in an endwise direction, cansin g it to swell out radially, or, in other words,

increase its diameter between the hunter and the clamps.

G G are two opposing dies or blocks hinged to the respective clamps and suitably joined at their inner ends to closely encircle the rod under treatment. They serve, primarily, to preventthe expansion or enlargement of that portion of the rod which is embraced between them, and, secondly, to determine the distance between and the form of the collars or enlargements. At their inner ends the dies G G are chamfered or recessed at the edges, as shown at g g, to give room for the expansion of the metal to form the collars. The inner edges of the bunter are also recessed at f, and the inner edges of the clamps recessed at e for the same purpose but the only requirement is that the annular spaces to receive the metal shall exist at opposite sides of the dies, and the recesses or spaces may be formed wholly in the dies or wholly in the clamps and the bunter. The dies are urged away -from the clamps by springs K, and their movement limited by adjustable stops L.

In operating the machine the rod or bar M is introduced between the open clamps and dies while the bunter is retracted, as shown in Figs. 1 and 3. As the cross-head and bunter advance, the clamps grasp the rod firmly, so that end motion is prevented, and the bunter passing over the end of the rod compresses and reduces the same endwise. As the rod is confined between the dies, it is prevented from swelling appreciably between them; but as the upsetting action progresses the metal expands into the form of two collars m m, one at each side of the dies.

In order to secure the proper distribution of the metal, it is found advisable to have the dies move with the rod as it is shortened, and it is for this reason that they are hinged, so that their active ends may move from their original position shown in Fig. 1 toward the dies to the position shown in Fig. 2. Of course any equivalent manner of mounting the dies which will permit them to run to and from the clamps may be used. By adjusting the stops to permit more or less movement of the dies the flow of metal may be properly distributed between the two collars.

hen the collars are to be formed on tubular material, the bunter is provided with a mandrel M to enter the tube and give the same internal support during the upsetting operation.

In order to determine the point at which the collars are to be formed on the rod, a step or gage N, to receive one end of the rod, may be fixed to the frame in any suitable manner. This gage also enables the operator to locate the two pairs of collars at equal distances from the respective ends of the rods.

lVhile I prefer to use the hunter or pressure device in the form shown, it is to be understood that I may use any equivalent device which will compress the rod endwise toward the clamp, the only essential requirement in this regard being that the rod shall be compressed endwise in such manner that it will be swelled out on both sides of the dies.

\Vhat is claimed is- 1. In an upsetting-machine for producing on a rod two collars simultaneously, the combination of a clamp to hold the rod, a bunter or pressure device to act endwise of the rod,

and intermediate dies to confine the rod'and limit its expansion to the required points.

2. In a machine for upsetting rods to produce two collars at atime, the combination of separable clamps to grasp the rod, a bunter or pressure device acting to reduce the rod endwise, and intermediate dies movable toward the clamp as the hunter advances.

3. The cross-head, its hollow hunter, and the slotted arm, in combination with the clamps, and the springs urging the dies away from the clamps.

a. In a machine for forming collars on tubular rods, the combination of a clamp to hold the rod, a hunter to act endwiso thereon, and a mandrel carried by the hunter to give internal support to the rod.

In testimony whereof I hereunto set my hand this 8th day of May, 1890, in the presence of two attesting witnesses.

YVILLIAM P. BETTENDORF.

\Vitncsses:

F. STANLEY ELMoRE, \V. R. KENNEDY. 

